package com.hunter.common.util;

public class Hex {
	/**将16进制转换为二进制 
     * @param hexStr 
     * @return 
     */  
    public static byte[] toBytes(String s) {
        int len = s.length();
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
                    + Character.digit(s.charAt(i + 1), 16));
        }
        return data;
    }
    
    public static void main(String[] args) {
		byte[] a = toBytes("AB10");
		for(byte b:a){
			System.out.println(b);
		}
	}
    public static byte[] stringToByte(String key) {
		String[] keys=key.split("-");
		byte[] keybyte=new byte[keys.length];
		for (int i = 0; i < keys.length; i++) {
			keybyte[i]=(byte)(0xff&Integer.parseInt(keys[i].substring(0, 2), 16));			
		}
		return keybyte;
	}
    
    /**将16进制转换为二进制 
     * @param hexStr 
     * @return 
     */  
    public static byte[] parseHexStr2Byte(String hexStr) {  
            if (hexStr.length() < 1)  
                    return null;  
            byte[] result = new byte[hexStr.length()/2];  
            for (int i = 0;i< hexStr.length()/2; i++) {  
                    int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);  
                    int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);  
                    result[i] = (byte) (high * 16 + low);  
            }  
            return result;  
    } 
    /**将2进制转换为16进制 
     * @param buf[] 
     * @return 
     */
    public static String parseByte2HexStr(byte buf[]) {  
        StringBuffer sb = new StringBuffer();  
        for (int i = 0; i < buf.length; i++) {  
                String hex = Integer.toHexString(buf[i] & 0xFF);  
                if (hex.length() == 1) {  
                        hex = '0' + hex;  
                }  
                sb.append(hex.toUpperCase());  
        }  
        return sb.toString();  
    }
}